python连接mongodb操作数据示例(mongodb数据库配置类)

一、相关代码
数据库配置类 MongoDBConn.py

#encoding=utf-8
'''Mongo Conn连接类
'''
import pymongo
class DBConn:
    conn = None
    servers = "mongodb://localhost:27017"
    def connect(self):
        self.conn = pymongo.Connection(self.servers)
    def close(self):
        return self.conn.disconnect()
    def getConn(self):
        return self.conn

MongoDemo.py 类

#encoding=utf-8
'''Mongo操作Demo
Done:
'''
import MongoDBConn
dbconn = MongoDBConn.DBConn()
conn = None
lifeba_users = None
def process():
    #建立连接
    dbconn.connect()
    global conn
    conn = dbconn.getConn()
    #列出server_info信息
    print conn.server_info()
    #列出全部数据库
    databases = conn.database_names()
    print databases
    #删除库和表
    dropTable()
    #添加数据库lifeba及表(collections)users
    createTable()
    #插入数据
    insertDatas()
    #更新数据
    updateData()
    #查询数据
    queryData()
    #删除数据
    deleteData()
    #释放连接
    dbconn.close()
def insertDatas():
    datas=[{"name":"steven1","realname":"测试1","age":25},
           {"name":"steven2","realname":"测试2","age":26},
           {"name":"steven1","realname":"测试3","age":23}]
    lifeba_users.insert(datas)
def updateData():
    '''只修改最后一条匹配到的数据
           第3个参数设置为True,没找到该数据就添加一条
           第4个参数设置为True,有多条记录就不更新
    '''
    lifeba_users.update({'name':'steven1'},{'$set':{'realname':'测试1修改'}}, False,False)
def deleteData():
    lifeba_users.remove({'name':'steven1'})
def queryData():
    #查询全部数据
    rows = lifeba_users.find()
    printResult(rows)
    #查询一个数据
    print lifeba_users.find_one()
    #带条件查询
    printResult(lifeba_users.find({'name':'steven2'}))
    printResult(lifeba_users.find({'name':{'$gt':25}}))
def createTable():
    '''创建库和表'''
    global lifeba_users
    lifeba_users = conn.lifeba.users
def dropTable():
    '''删除表'''
    global conn
    conn.drop_database("lifeba")
def printResult(rows):
    for row in rows:
        for key in row.keys():#遍历字典
            print row[key], #加, 不换行打印
        print ''
if __name__ == '__main__':
    process()